Coal holing and cutting-in machine.



No. 773,882. PATENTED NOVfl, 1904.

A. E. MILLWARD.

GOAL HOLING AND CUTTING-IN MACHINE.

APPLICATION FILED NOV. 6, 1903.

N0 MODEL. 5 SHEETS-SHEET 11 mag NO MODEL.

PATENTED NOV. 1, 1904. A. B. MILLWARD.

COAL HOLING AND CUTTING-IN MACHINE,

APPLIOATION FILED NOV. 6, 1903.

5 SHEETSSHBET 2.

Fig.2.

WIT/\l ESExS A. B. MILLWARD.

GOAL HOLINGAND CUTTING-IN MACHINE.

APPLICATION FILED NOV. 6, 1903. N0 MODEL.

5 SHEETS-SHEET 3.

vV/ TNEs 5 E5 //V VE/V TO 2 32 1 4 v deil'zwawmvlzwwrd k PATENTED NOV.1, 19.04.

A. E. MILLWARD.

GOAL HOLING AND CUTTING-IN MACHINE.

APPLICATION FILED NOV. 6, 1903.

5 SHEETSSHEET 4.

N0 MODEL.

W/ TNE6 65 \S PATENTED NOV. 1, 1904.

6 SHEETS- SHEET 5.

A. E. MILLWARD.

APPLICATION FILED NOV. 6, 1903.

UNTTDD STATES Patented November 1, 1904:.

PATENT @rricn.

COAL HOLING AND CUTTING-IN MACHINE.

SPECIFICATION forming part of Letters Patent No. 773,882, dated November1, 1904.

Application flied November 6, 1903. Serial No. 180,068. (No model.)

To (all whom it nuty concern:

Be it known that I, ALBERT EDWARD MILL- WARD, mining engineer, residingat 113 Manchester road, Accrington, in the county of Lancaster, England,have invented certain new and useful Improvements in Coal Holing andCutting-In Machines, of which the following is a specification.

This invention relates to machines for working coal or other mineral byholing or undercutting it, also by cutting in or making a vertical slotagainst a fast side or in any required position; and the inventionconsists of the following parts and arrangements: A pair ofcutter-wheels are fixed on an axis at any required inclination to oneanother to enable them to make a cut or incision in the coal or othermineral of such width that all other parts of the machine required to doso may be able to follow up the cutters. These cutter-wheels aresupported at the extremity of a steel tube through which the main shaftpasses, driving the cutter-wheels by means of bevel-gearing. The groundforming a core between the cutter-wheels not cut away by them is removedby a crown-piece carrying cutters or by cutters mounted at or near theend of the drivingshaft, which is extended beyond the driving-gear forthe purpose. When holing, the tube or hollow arm carrying the shaft andcutters is loosely attached by means of an encircling collar to atelescopic screw-column, which is tightened by an adjusting-screwbetween the roof and fioor. \Vhen used for cutting-in, the hollow arm issimilarly secured to a horizontal branch piece clamped in any requiredposition to the telescopic column.

The main shaft of the machine is actuated by an electric motor or othersuitable motor driving through flexible shafting or by any other poweror available means.

The objects of this invention are toattain from moderate driving power aconsiderable speed of the cutters for the effectual cutting of the coalor other mineral; to enable the holing to be done between theroof-supports of the mine without shifting them, thus avoiding thedifficulty and danger consequent in many cases upon doingso, alsowithout laying any rails or track for the purpose, by the fewness andsimplicity of the parts, also by their lightness and portability, and bythe ease and readiness with which the whole machine may be manipulatedto enable coal cutting by machinery to be carried out more extensivelyin all places where it is possible to introduce a man and an ordinarypick; to enable coal to be successfully got by machinery in pil-Jar-and-stall, working as well as in longwall working, by performing thelarge proportion of cutting-in in a ready, simple, and effectual manner.

In the accompanying sheets of drawings, Figure 1 is an elevation of thecutting device of a coal holing and cutting-in machine made according tomy invention, the casing of the machine being shown in section. Fig. 2is a View, on a reduced scale, of the machine supported by a verticalpillar in a coal-mine. Figs. 3, 4;, and 5 are elevations, plan, and endviews, respectively, of the machine; and in Fig. 5 an additional bracketfor vertical and angular work is shown secured adj ustably upon thevertical pillar.

In' the drawings, 2 designates a tubular casing upon the surface ofwhich is cut a screwthread 3 for any desired length, and through thistube passes a shaft 4, upon which is secured a bevel-pinion 5, the frontend of which shaft is supported in a bearing-block 6, provided with twoarms which are supported in recesses 2, formed to receive them in theenlarged end of the tube or casing 2. On each of these arms is mountedloosely a bevelwheel 7, both of which wheels gear into the pinion 5, andupon the boss of each wheel 7 is secured a rotatory cutter-block 8,provided with suitable cutting-teeth which are secured to thecutter-block in any well-known manner. The shaft I projects somedistance beyond its bearing 6 and has attached to its end a crown-pieceor cutter 9 and side cutters 10 for removing the core left by therotatory cutters.

In Fig. 2 the cutting mechanism is shown in its working position in aseam or bed of coal and supported by a vertical pillar 11, held as usualbetween the top and bottom of the seam. In this view a flexible shaft12,

which may be driven by any convenient motor or source of power, 1s shownattached to the machine-shaft 4 by a coupling 30.

In Figs. 3, 4:, and a bracket 13 is fitted 5 to swivel around the pillar11, and through a projecting portion of this bracket is passed thescrew-threaded tube 2, and upon this thread 3 is screwed a pinion 31.Two keys 33 are secured in the interior of the bracket 13 and )roectinto kc wa s 34 formed in l J .V 5 1 the tube 2 to prevent it turning. Ahanddriven spur-wheel 1 1 is fitted upon a stud carried in an extensionof the bracket 13 and gears into the pinion 31, which is prevented 5from moving endwise by the bracket 13 on *from rotating by the keys 3 3the shaft 1,

with the cutters, can be advanced or retired, as desired. Figs. 3, at,and 5 also illustrate an arrangel'nent for traversing the coal-cuttingmachine round the pillar 11. as a center,

5 such as is used for cutting a semicircular groove in the face of aseam. A hand-wheel 15 is secured upon a stud 16, carried in a bracket17, secured upon the pillar 11, and between it and. the base of thepillar is mount- 3 ed the aforesaid swivel-bracket 13, upon the face ofwhich is secured a worm-wheel 19, and this worm-wheel is driven by aworm 20, secured upon the stud 16, so as to swivel the shaft with thecutters round the pillar 11, as

required.

\Vhcnever the cutters 8 are cutting coal, the

crown-cutter 9 and'side cutters 10 break down.

and remove the core left by and between the cutters 8.

My improved machine can be applied to cutting vertically or at anydesired angle by mounting the brackets 13 and 17 on a horizontal arm 21,(see Fig. 5,) which is of the same diameter as the vertical pillar 11,to which it is clamped. WVhen mounted on the horizontal arm 21, themachine can be turned round in any direction and tilted to any angleupon the bracket 17.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, 1s

1. A mining-machine comprising a casing,

a driven shaft supported therein, and a pair of forwardly-divergingrotary cutter-wheels on said shaft, substantially as described.

2. A mining-machine comprising a casing, a driven shaft supportedtherein, a pair of forwardly-diverging rotary cutter-wheels on saidshaft, and core-cutters operating between said cutter-wheels,substantially as described.

A mining-machine comprising a casing, a shaft supported therein,forwardly-diverging cutter-wheels secured to said shaft, means forrotating the shaft to operate the cutters and means for feeding thecasing, together with the cutters, forward, substantially as described.

In witness whereof I have hereunto set my hand in presence of twoWitnesses.

ALBERT EDWARD MILLWARI).

WVitnesses:

S. D. GILLnrr, H nnnmn'r ROWLAND ABBEY.

